单词：near zone electric field strength meter
单词：near zone electric field strength meter 相关文章
Scientists: Spiders Use Electric Fields to Move through Air Scientists have long wondered how spiders can use the webbing they make to fly. The 19th century English naturalist Charles Darwin commented on their behavior when very small spiders landed
2018年VOA慢速英语(七)月
American swimmer Michael Phelps is seeking to navigate uncharted territory. For his second straight Olympics, the 23-year-old Phelps is aiming to win eight gold medals to surpass the record seven that fellow-American swimmer Mark Spitz won in 1972.
VOA标准英语2008年（七月）
Nicholas Willis has won a bronze medal in the men's 1500-meter race at the Beijing Olympics. He is one of many athletes who lives in the United States but was born in another country. VOA's Jim Stevenson has more on the middle distance runner from N
VOA标准英语2008年（八月）
Scientists believe that the South Atlantic Anomaly, is a sign of a global decline in the magnetic field. Evidence of this comes from a surprising source. Dr. Mimi Hill uses pottery to uncover the secrets of earth's magnetic past. Ancient pots tell us
自然百科2011年
Larry Newitt from the Geological Survey of Canada charts the movement of the magnetic North Pole as it wanders the icy reaches of northern Canada. To determine where the magnetic pole / is, we can't rely on one single observation. What I try to do is
自然百科2011年
By Yi Suli Washington 14 May 2008 University of Arizona cross country and distance track and field coach James Li was born and raised in China. He moved to the U.S. more than two decades ago to coach collegiate running and just last year was named th
VOA标准英语2008年（五月）